TBolt USA is open and filling orders quicker than ever!
Email: contact@tboltusa.comText 704-826-5887Request a Callback

TBParts - Vintage Honda 88cc Race Head big bore Kit
All ATC 70 TRX70

Vital Information
Part No TBW0939-All-ATC70-TRX70
Stock Level 6 Left

Same great quality CRF50/XR50 88cc kits now for Vintage

TB Race Head, 88cc Bore & 20mm Carb Kit

This is the Race Head 88 kit that everyone is talking about Performance and Price make Mike's Honda Trail Bike 88 w/ Race head a real winner Race

Key Features:

  • Lightweight aluminum cylinder with steel sleeve
  • Cast in mounts on cylinder for aftermarket skid plates
  • Oversized cooling fins on cylinder for efficient heat dissipation
  • 52mm piston with rings, pin, & clips
  • High performance race camshaft for the race head
  • Larger valves (25mm intake & 22mm exh) and porting for increased performance.
  • Also has bigger cooling fins. Includes all necessary parts. Comes disassembled.
  • 20mm Performance carb assembly.
  • High volume oil pump - TBW0225-6V
  • High speed 2mm drill bit - TRC-5526
  • 2 Size clutch tool - WHS-2274
  • TB oil cooler kit w/ intake mount - TBW1370
  • Sta-bil fuel stabilizer - W-57-1109
  • 12 Way rotating spacer - TBW0900
  • Pre-filter - OW-20-2159-01
  • ATC 70 - All years
  • TRX70 - All Years 
Kit Includes:
  • TBW0219 - Piston
  • TBW0206 - Gasket
  • TBW0156 - Cylinder
  • TBW0125 - Carb
  • TBW0273 - Intake
  • TBW0301 - Throttle Cable
  • TBW0174 - Air Filter
  • TBW0189 - Race Cam
  • TBW0385 - Race Head & Valves Assembly
  • TBW0294 - Jet Kit
  • TBW0251 - Right Side Cover
  • TBW0861 - Cam Sprocket
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).

NOTE Throttle cable is for CR type twist throttles

Write Review

Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online Pit Bike Technical Info Database!

We have all necessary support parts on hand.

Most orders ship same, or next business day, unless otherwise noted above.